The number of molecules with energy greater than the threshold energy for a reaction increases five — Chemical Kinetics Chemistry Question

Question

The number of molecules with energy greater than the threshold energy for a reaction increases five fold by a rise of temperature from 27ºC to 42ºC. Its energy of activation in J/mol is ________. (Take ln 5 = 1.6 ; R = 8.3 J mol K ) –1 –1